PostgreSQL数据库中获取表主键名称

一、如下表示，要获取teacher表的主键信息：

select pg_constraint.conname as pk_name,pg_attribute.attname as colname,pg_type.typname as typename from 
pg_constraint  inner join pg_class 
on pg_constraint.conrelid = pg_class.oid 
inner join pg_attribute on pg_attribute.attrelid = pg_class.oid 
and  pg_attribute.attnum = pg_constraint.conkey[1]
inner join pg_type on pg_type.oid = pg_attribute.atttypid
where pg_class.relname = 'teacher' 
and pg_constraint.contype='p'

二、效果图：

由图可知，主键约束的名称为pk_teacher，主键字段（列）为"id"，主键字段的类型为：uuid。

——宋兴柱发表于2015年7月30日济南中迪智业。　　